Almost nothing is more fun, on a cold winter's night, than gathering around the fire with your friends and playing a game of Mad Libs. And Jimmy Fallon did it right: he busted out 'Twas the Night Before Christmas and asked a few of his recent guests—Patton Oswalt, Jack McBrayer, T.I., Jesse Eisenberg, Zac Efron, and others—for help filling in the blanks. As with most Mad Libs, it starts out normal and then veers quickly into hilarious territory. Major noun-finding props go to Maya Rudolph, but top Mad Lib honors obviously go to everyone's boyfriend, Brian Williams, who can read us a bedtime story about his loafers any time he wants!